Lubricator



G. BIGNELL.

I LUBRICATOR.

APPLICATION FILED FEB. 16, 1920.

1,435,276. Patented Nov. 14, 1922 fig 20 1 M LIM 2 1 g I? Z2 1.9 14

J "L" 5 F495 1/ I IIIS 4L /0 I B jl )M' 4 Ira/2111272" Gerald Bq'gnellPatented Nov. 14, 1922.

entree "s rts GERALD BIGNELL, OF CHICAGO, ILLINOIS. I

PENJT: e ee LUBRICATOR.

Application'filed February 16, 1920. Serial N0.I359,148.

In the present practice, is customary to 'use so-called grease cups orvlubricators for lubricating parts of machinery wherein theplungerv rodof'the 'gre'asecup is given a partial turn at predetermined intervals soas to place thegrease or other lubricant within the container underextra pressure and thereby force the. grease or lubricant through thedischarge opening. Grease cups or lubricators of this character are notentirely satisfactory for the reason that the lubricant 'is placed undera. comparatively heavyinitial compression immediately upon advancementof the plunger so that, as the lubricant is gradually heated at thedischarge opening, the lubricantiwill feed out too rapidly shortly afterthe plunger has been advanced and, toward the end of the period, beforethe plunger is next advanced,

the lubricant will fail to properly .feed. Furthermore, with grease'cupsor lubricators of the character indicated, the attention of the.operator is required .at comparatively frequentintervals and in thehaste of advancing theplungers of the grease cups, the manipulation isnot always uniform sothat the lubricant is fed at different rates atdifferent times. I I

The object of myinvention is to provide a lubricator or grease cup orgrease gun which will correspond in shape and size substantially withtheusual commercial forms now on the market and which will be manuallyoperated in substantially the same manner but wherein provision is madefor temporarily storing a small quantity of the grease or otherlubricant underv the action of a spring or other expansible means sothatthe lubricant will be fed automatically and under a substantiallyuniform mild pressure during the entire intervals betweenadvancement ofthe plungers. I I I. II

More specifically, the object of my invenforming a part ofthis tion isto provide a lubricat or or grease cup wherein is provided a temporarystorage. chamber having a spring pressed plunger" thereln and into whichasmall quantity of l the lubricant temporarily forced each time the mainplunger of the grease cupis man-1 ua lly-advanced whereby. a moreuniform and, elhcient delivery of the lubricant is ob-" tained. Y 1 1 IIn the d'raw ing forming a. part of this specification, Figure 1 is avertical sectional view of a lubricator or grease cup showing myimprovements embodiedtherein. And Figures 2 and .3 are horizontalsectional views taken substantially on the lines-2-2= and 8-3respectively, of Figure 1. Y I

,In said' drawing, the lubricatoror grease. cup-1s shown as formed by alower casting A, and a shell or casing- B. Within the grease cup isprovided a main plunger C adapted to be advanced manually-by means ofthe hand wheel'l). I

The lower. end of the casting A ed as indicated at' 10 inorder to adaptthe grease cup for attachment to the proper part of the machine to belubricated, the casting A being formed with a hexagonal cross sectionimmediately above the-threaded part as indicated at ll to facilitatetheuse of a wrench. The lower part of the member A is provided with adelivery opening or a is threads duct 12 of .somewhat restricted areaand through which the grease or lubricant is adapted to be discharged ordelivered. The

rate of-delivery of the lubricant may becontrolled by an adjustablethrottle screw indi; cated at 13.

The casting A is preferably interiorly threaded at its upper end asindicated at 14 to receivethe corresponding threaded lower end of theshell or casing B. The upper wall of the shell Bis provided with thelboss indicated at 15which is provided with a threaded perforation tocooperate with the screw 16 which :carries the hand wheel D at its upperend. The lower end of the screw 16 is swiveled to the plunger C whichmay be conveniently done'by forming the plunger C witha lower disc 17and upperdisc 18 andan interposed washer or packing 19. The two discs 17and 18 are rigidly united by riveting or otherwise suitably securing thesame and the upper disc 18has an upwardly ofiset centrally disposedflange nin dicated at .ZOwhich is slotted as indicated at 21 toaccommodate the shank of the screw 21, the flange overhanging the'annulan flange 22 at the lower end'off the screw 16.

24: may be boredi'or: reamed an interior cylindrical temporary storage hr hn 'di eff'th templek my h w 8 chamber ha e jybpe i l 5 therein'which,it willbe noted,'-is located in relatively close proximity tothe-delivery v I ton-having a stem 29 guidedfin the washer 25' opening12. The outer end of t.he te1iip,o r al-y storagechamber25 may beclosed'by any] suitable means such asfthe washer 2T threaded therein.A'pi'ston 28' is provided in the temporary; storage chamber, said pis27*, there being a coiled 30 interposed between the piston 2 8, andwasheiz'27'l In actual practice, the spring;30 vv ill inade of"relatively light caliber sdv as 4 to readily admit the lubricantfromlthe main ofthe'grease cup and-'also' i orce the lublti cant"which.is temporarily stored i'n the chamber 25 out gradually and with sufficient pressure to permit, the proper. delivery from the opening 12."

In operation, "the main, chamber of the grease cup or lubricato r-whic his provided by the members A and B, willbe filled' w i th the grease orother lubricant and ger C be disposed at the top of-said main chamber.By giving 'the" hand. partial turm-as for instance a quarter-turn,

the piston or plunger C will be wardly a slight amount, therebyputtingthe grease orlubricant in the main'chambler In};

deradditionali pressure In actual pram tice,'thispressure Will not be gratnough to compel the ejection of the lubricantat an abnormal ratethrough the" opening l3 so long as'the lubricant remains at no i'fin'altemper'ature butithe increased pressure inrposed upon the lubricant bythe advancementfof the piston Cjwillbe sufficient to over: come thespring so an there y permitl'a small charge of the lubricant to ent rthe temporary storage chamber, 25. Thereafter, it 'isevi H compressedspringiBO .e su'flic ient to gradually eject t e lubricant temporarilystoredfin the chamber 25 outf through the p n h ll br a'n l mdueli dlivered through theopening 1 2*to the ma,- chine being lubricated} Withthis-construe tion,"I obtain avery'uniform re d the lubricant and'efiect a large saving inthe quantity of lubricant employed because incommunication with sai ent that the energ stored" the the older types ofgrease cups, the method of; feeding "has been extremely was fiaful.Furthermore; Ilhave found that the plunger of my improved grease cupneed not be ad- .v naedi asireqnently as with the former types of greasecups, thereby requiring less attention on the part of the engineer oroperator. iflthough- I'-ha-ve-* herein shown and described what I nowconsider the preferred manne of arry g o t my inven on, the

ame. "is mer ly llustrat v cont mpl t l h nges nd odi ti n as. com

hereto.

I- claim: Y

' m a t e faf' manufacture 'a i ihr her, said means having a pm?'thei'eofexten'ded ""outwardl tr the "t ate ape m t te -be s e exte r thre f;

ai hbfiemr eieg iire d alsowi m smaller. temporary store e chamberhaving 5min 'fiak b tb w en se 'pr s e p r m a s and. an deli r o 5 Sa d1 icate having n for m al a f i b eia l3* ejecting the lubricant fromsaid temporary st" rage chamber into 'saidmain chamber.

s an article manufacture, alubricaw l f i hs1fe a s and ash k'm'icasting being provided with mean's' at tachin ;it; to a machine to belubricatedand a m d a o h a r l tive y: ma emp m y stem 6 h mb r h in;the i Ste :1 cham erifor the lubricant" pros har e p nii n pr mi fil aibl livery opening, saidlubricator being pro vided w1th,means forincreasing'th'e ressure on' the lubricant within the am; her to thereby!temporarily foi'ce portion of the lubrican'tinto said temporary storagechamber, sai 'lubricator having also man's within the temporary storagechamber, oma i l y r du y i i g" bricant therefrom at the lubricant isll d scharg d fie said" 'e i' opening.

wi ening s ds p'dr h Qrad 4. In a device of the character described,

the combination with a casing providing a main storage chamber andhaving a delivery opening at one end thereof; of a plunger manuallyadjustable lengthwise of said chamber I within the casing; a temporarystorage chamber having means roviding for the admission thereto and thee ec'tion therefrom of lubricant; and a spring controlled plunger withinsaid temporary storage chamber.

l 5. As an article of manufacture, agrease cup comprising a casinghaving a delivery opening at one end thereof, a hand operated plungerslidably mounted within thecasing from the opposite end toward saiddelivery opening; and means in communication with the interior of saidcasing intermediate said plunger and the-delivery opening and'with:

in which a portion of the lubricant may be temporarily stored under anexpansive ejecting action when said plunger is operated to compressthelubricant at a. rate ,faster't'han it is normally delivered through saiddelivery. opening.

6'.*In'a1ubricator, the combination with a hollow casing providing amain storage chamber, said easinghaving a'delivery open ing'and adaptedto be attached toaq ma chine to be lubricated; of a piston slidablymounted within said casing; manually operable means v-extending to,v theexterior oi the casing for advancing said piston; a'temporary storagechamber disposed adjacent said delivery opening and, having an open ingin commun cation-jwiththe interior-of said casing; and'a spring pressedplunger withinsaid temporary storage chamber. a. I

In Witness that I claim, the foregoing I .have hereunto subscribed myname this. 9th

